22721885 has 16 divisors (see below), whose sum is σ = 28169856. Its totient is φ = 17581248.

The previous prime is 22721873. The next prime is 22721893. The reversal of 22721885 is 58812722.

It is a cyclic number.

It is not a de Polignac number, because 22721885 - 2¹² = 22717789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48422 + ... + 48888.

It is an arithmetic number, because the mean of its divisors is an integer number (1760616).

Almost surely, 2^22721885 is an apocalyptic number.

It is an amenable number.

22721885 is a deficient number, since it is larger than the sum of its proper divisors (5447971).

22721885 is a wasteful number, since it uses less digits than its factorization.

22721885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772.

The product of its digits is 17920, while the sum is 35.

The square root of 22721885 is about 4766.7478431316. The cubic root of 22721885 is about 283.2357826420.

The spelling of 22721885 in words is "twenty-two million, seven hundred twenty-one thousand, eight hundred eighty-five".